I never really checked until yesterday but I noticed now that there are no mids in the rear doors only tweeters. So if I am correct this car only has:

Front Doors
2 tweeters + 2 mid bass + 2 mids

Rear Doors
2 mids

Rear Deck
2 mid bass

If that's correct then this car is crying for upgraded speakers and adding a sub. My trunk space is pretty important to me so I am wondering if a deck mounted sub is doable or maybe an enclosure near the battery area. Any help or advice would really be appreciated.

EDIT: I just checked the BSW deck mounted sub enclosure and that looks really sweet. Since I am thinking of using my Hercules amp for a sub I'm not sure this is the best choice for me but it is a consideration.